Answer:
He made 16 groups which means 5 Students in each group
Step-by-step explanation:
Because 80 divided by 16 is 5 and 5 is a prime number
7:15=(7*3):(15*3)=21:45
7:15=(7*9):(15*9)=63:135
21:45 and 63:135
Answer:2
Where are the sets? I don't see any...
